If you describe a boy's or man's behaviour as unmanly, you are critical of the fact that they are behaving in a way that you think is inappropriate for a man.
例句
Your partner can feel the loss as acutely as you, but may feel that it is unmanly to cry.你的搭档跟你一样极度地失落，但他也许会觉得男儿有泪不轻弹。
英汉词典释义
adj.
无男子汉气概的
It was once thought unmanly not to drink and smoke.身为男子不抽烟不喝酒曾视为无男子气概。
英英词典释义
Adjective
1. not possessing qualities befitting a man
2. lacking in courage and manly strength and resolution; contemptibly fearful